Why stretch it out more? LSL was fun, but it's time is passed. Why not something new like "Skinny Tie Sam" or "Pleather Pants Paul"? Create the world from scratch and don't be beholden to what's come before.

edit in case anybody is interested, they should check out Matt Chat on Youtube, some of the most compelling interviews with adventure game designers of the past...

Here's Part 1 of "Al Lowe" (designer of LSL) http://www.youtube.com/watch?v=9PGGEFQdZuw